The utility model relates to a three-dimensional Helmholtz coil magnetic-field experimental instrument, which comprises an experimental host machine and a test bench electrically connected with the experimental host machine. The test bench comprises a base plate, two mutually parallel supporting frame ...
Furthermore, we characterize the inductances of the coils and experiment with wireless power transfer between the coils. We found a self-inductance of the coils on the order of 4 mH. We found that using a paramagnetic material for the core of our power transmission assembly allowed us to ...
In a laboratory experiment, we have realised two rectan- gular belts surrounding a central target area that is to be protected. In the configuration (a) the belt is composed by cavities open to the sea by a neck (our Helmholtz resonators); in the configuration (b) it is composed by ...